CurrentCheck Pro Circuit Tester

CurrentCheck Pro Circuit Tester is a professional automotive electrical diagnostic tool designed to identify relay faults and wiring issues in seconds. With a real-time 0.01A-19.99A current readout, in-circuit bypass switch, 6 universal relay adapters, auto polarity detection, and a blue backlight display, this all-in-one circuit tester delivers fast, accurate electrical diagnostics for cars, trucks, EVs, RVs, and marine vehicles.

In-Circuit Bypass Switch Instantly determine if it’s a relay or wiring problem. Features include: • Controls power downstream of relay instantly • Identifies bad relay vs wiring issue in seconds • Fast and accurate fault isolation • Essential diagnostic tool for every electrician

Real-Time Current Readout Precise current measurement for every electrical component. Features include: • 0.01A to 19.99A measurement range • 20A continuous and 30A peak capacity • Real-time amp draw monitoring • Precise readings for professional diagnostics

Power On/Off Control Testing Test every electrical component with live current monitoring. Perfect for testing: • Fuel pumps and injectors • Headlights and lighting systems • DC motors and actuators • Any automotive electrical component • Watch amp draw in real time during testing

6 Universal Relay Adapters Fits the most common relay types across every vehicle. Included adapters: • #613-1 Mini Relay 20 Amp • #613-2 Micro Relay 20 Amp • #613-3 BMW Two Branch Relay 20 Amp • #613-4 Large Rectangular 20 Amp • #613-5 Maxi Relay 20 Amp • #613-6 Square Bosch Style 20 Amp

Auto Polarity Detection No guessing — instantly knows positive or negative. Features include: • Automatic positive and negative detection • No manual polarity checking needed • Eliminates guesswork during diagnosis • Fast and accurate polarity identification

Blue Backlight & Front Work Light Perfect visibility for low-light repair environments. Features include: • Blue backlight display for easy reading • Front work light for dark repair spaces • Clear display in any lighting condition • Professional visibility for every repair environment

Wide Vehicle Compatibility Works with virtually every vehicle and electrical system. Compatible with: • Cars and SUVs • Trucks and commercial vehicles • Electric vehicles (EVs) • RVs and motorhomes • Marine and boat electrical systems • BMW, Bosch, and most common relay types

Safety Tip: Always turn off ignition before testing. Fuses can get hot — let them cool before touching.

Diagnose Every Circuit, Fix Every Fault Whether you’re diagnosing a faulty relay, testing a fuel pump, checking injector amp draw, or troubleshooting a wiring issue, CurrentCheck Pro Circuit Tester gives you the real-time current monitoring, bypass switch control, and auto polarity detection to identify and fix every electrical problem — quickly, accurately, and confidently.

Upgrade your automotive diagnostic toolkit with CurrentCheck Pro Circuit Tester — the professional in-circuit bypass current tester designed for real-time amp monitoring, 6-adapter relay compatibility, and fast accurate electrical fault diagnosis for every car, truck, EV, and marine vehicle.